featured sponsor

forecast sponsor

Avalanche Bulletin - Kootenay Boundary    


Date Issued   Sunday, 08 April 2012 5:17 PM      Valid Until    Monday, 09 April 2012 4:00 PM
Danger Rating: Monday Alpine Treeline Below Treeline
2 - Moderate Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
2 - Moderate Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
1 - Low Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.
Tuesday Wednesday
Alpine 3 - Considerable 4 - High
Treeline 3 - Considerable 4 - High
Below Treeline 2 - Moderate 3 - Considerable
Confidence: Good
Learn more about danger ratings
Low Moderate Considerable High Extreme

Generally safe avalanche conditions. Watch for unstable snow on isolated terrain features.

Natural and human-triggered avalanches unlikely.

Small avalanches in isolated areas or extreme terrain.

Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.

Natural avalanches unlikely; human-triggered avalanches possible.

Small avalanches in specific areas; or large avalanches in isolated areas.

Dangerous avalanche conditions. Careful snowpack evaluation, cautious route-finding and conservative decision-making essential.

Natural avalanches possible; human-triggered avalanches likely.

Small avalanches in many areas; or large avalanches in specific areas; or very large avalanches in isolated areas.

Very dangerous avalanche conditions. Travel in avalanche terrain not recommended.

Natural avalanches likely; human-triggered avalanches very likely.

Large avalanches in many areas; or very large avalanches in specific areas.

Avoid all avalanche terrain.

Natural and human-triggered avalanches certain.

Large to very large avalanches in many areas.

Loose Wet
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
Intermittent strong sun is forecast for Monday as convective clouds and the sun dance through the sky. Watch for loose snow avalanches, with the potential for deeper slab avalanches on slopes that bake all day under the strong spring sun.
Travel and Terrain Advice
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.
  • Extra caution needed around cornices with current conditions.
  • Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.
Persistent Slabs
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
Two layers to watch: April 3rd, down 30 cm & Mar. 26, down 100 cm. I'd be wary of triggering the deeper layer on steep unsupported slopes, especially in places where the snowpack goes from thick to thin; near ridge crests and rock outcroppings.
Travel and Terrain Advice
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.
  • Extra caution needed around cornices with current conditions.
  • Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.
Cornices
What Elevation Zone?
Which Slopes?
Chance of Avalanches?
Expected Size?
Cornices have grown large & unruly. Cornices receiving direct sun will eventually grow weak & there is potential for cornice fall to initiate deep persistent slab avalanches on underlying slopes. Pay attention to what's happening above you.
Travel and Terrain Advice
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.
  • Extra caution needed around cornices with current conditions.
  • Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.

Prepared by ghelgeson